topic 1 0.0 / 5 ? Chemistrykey conceptsGCSEEdexcel Created by: bertie321Created on: 21-12-21 16:17 who made the first model of the atom John dalton 1 of 18 who made the plum pudding model Rutherford 2 of 18 what are the subatomic particles in the nucleus proton and nutron 3 of 18 what orbits an atom electons 4 of 18 what is an isotope different form of the same element with the same amount of protons but it has a different number of neutrons 5 of 18 who made the first proper periodic table Dmitri Mendeleev 6 of 18 how many electrons are there in the 1st, 2nd and 3rd shells 1st=2 2nd=8 3rd=8 7 of 18 how do ions form when atoms lose or gain elections 8 of 18 which groups are more likley to form ions 1, 2, 6 and 7 9 of 18 what structure does a ionic compound have a regular lattice 10 of 18 what are the properties of an ionic compound high melting and boiling points. they also can't conduct electricity as a solid but can as a liquid 11 of 18 what are the properties of a simple molecular substance very strong covalent bonds and weak forces of attraction gas or liquid at room temperature 12 of 18 what are the properties of metals high melting points, good conductors of electricity, good conductors of heat and high density. 13 of 18 what is the conservation of mass during a chemical equation no atoms are destroyed or created 14 of 18 what is empirical formula it is the smallest whole number ratio of atoms 15 of 18 what the emprical formula of C6 H12 O6 C H2 O 16 of 18 number of moles = M/Mr (mass/molecular mass) 17 of 18 concentration= mass/volume 18 of 18
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